Sony CyberShot DSC-P72 Service Manual page 57

8. V COM Adjustment (SY-85 board)
Set the DC bias of the common electrode drive signal of LCD to the
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous vertical lines.
Mode PLAY (
Signal Arbitrary
Measurement Point Check on LCD display
Measuring Instrument
Adjustment Page 4F
Adjustment Address 84
Specified Value The brightness difference between the
section A and section B is minimum.
Note: Perform "Bright Adjustment" and "Contrast Adjustment" before this
adjustment.
Adjusting method:
Order Page Address Data
1 00 01 01
2 40 F1 82
3 4F 02 03
4 4F 84
5 4F 84
6 4F 84
7 4F 02 00
8 40 F1 00
9 00 01 00
B
A
B
A
Fig. 6-1-19.
)
Procedure
Set the data.
Write the data.
Write the data.
Change the data so that the
brightness of the section A and
that of the section B is equal.
Subtract 2 from the data.
Write the data.
Write the data.
Write the data.
Set the data.
A
B
A
B
9. White Balance Adjustment (SY-85 board)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: Use the AC power adaptor during this adjustment.
Note2: Check the white balance only when replacing the following parts.
If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC801
Adjusting method:
Order Page Address Data
1 00 01
2 40 F1
3 4F 88
4 4F 89
5 4F 88
6 4F 88
7 4F 88
8 4F 89
9 4F 89
10 4F 89
11 40 F1
12 00 01
6-37
DSC-P72
PLAY ( )
Arbitrary
Check on LCD display
4F
88, 89
The LCD screen should not be colored.
Procedure
01 Set the data.
0A Write the data.
8E Write the data.
77 Write the data.
Check that the LCD screen is
not colored. If not colored,
proceed to step 11.
Change the data so that the LCD
screen is not colored.
Write the data.
Change the data so that the LCD
screen is not colored.
Write the data.
If the LCD screen is colored,
repeat steps 6 to 10.
00 Write the data.
00 Set the data.